Data Description

Citation:
Hu, MY et al. (2015): Localization of ion-regulatory epithelia in embryos and hatchlings of two cephalopods. Unpublished dataset #842790,
Supplement to: Hu, Marian Y; Sucre, Elliott; Charmantier-Daures, Mireille; Charmantier, Guy; Lucassen, Magnus; Himmerkus, Nina; Melzner, Frank (2010): Localization of ion-regulatory epithelia in embryos and hatchlings of two cephalopods. Cell and Tissue Research, 339(3), 571-583, doi:10.1007/s00441-009-0921-8
Abstract:
The tissue distribution and ontogeny of Na+/K+-ATPase has been examined as an indicator for ion-regulatory epithelia in whole animal sections of embryos and hatchlings of two cephalopod species: the squid Loligo vulgaris and the cuttlefish Sepia officinalis. This is the first report of the immunohistochemical localization of cephalopod Na+/K+-ATPase with the polyclonal antibody alpha (H-300) raised against the human alpha1-subunit of Na+/K+-ATPase. Na+/K+-ATPase immunoreactivity was observed in several tissues (gills, pancreatic appendages, nerves), exclusively located in baso-lateral membranes lining blood sinuses. Furthermore, large single cells in the gill of adult L. vulgaris specimens closely resembled Na+/K+-ATPase-rich cells described in fish. Immunohistochemical observations indicated that the amount and distribution of Na+/K+-ATPase in late cuttlefish embryos was similar to that found in juvenile and adult stages. The ion-regulatory epithelia (e.g., gills, excretory organs) of the squid embryos and paralarvae exhibited less differentiation than adults. Na+/K+-ATPase activities for whole animals were higher in hatchlings of S. officinalis (157.0 ± 32.4 µmol g FM -1 h-1) than in those of L. vulgaris (31.8 ± 3.3 µmol g FM -1 h-1). S. officinalis gills and pancreatic appendages achieved activities of 94.8 ± 18.5 and 421.8 ± 102.3 µmolATP g FM -1 h-1, respectively. High concentrations of Na+/K+-ATPase in late cephalopod embryos might be important in coping with the challenging abiotic conditions (low pH, high pCO2) that these organisms encounter inside their eggs. Our results also suggest a higher sensitivity of squid vs. cuttlefish embryos to environmental acid-base disturbances.
Project(s):
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Species *SpeciesHu, Marian Y *
2Type *TypeHu, Marian Y *
3Replicates *Repl#Hu, Marian Y *
4Sodium/Potassium adenosine triphosphatase gene expression *Na/K-ATPaseHu, Marian Y *
5Sodium/Potassium adenosine triphosphatase gene expression, standard deviation *Na/K-ATPase std dev±Hu, Marian Y *
6Adenosine triphosphatase, other *ATP otherHu, Marian Y *
7Standard deviation *Std dev±Hu, Marian Y *other ATPase
8Adenosine triphosphatase, total *ATP totHu, Marian Y *
9Standard deviation *Std dev±Hu, Marian Y *total ATPase
10Change in Sodium/potassium ATPase alpha subunit expression *NaK-ATPase%Hu, Marian Y *
Size:
40 data points

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